Speed governor for pneumatic motors



July 3, 1923.

w, c. COLLIGNON SPEED GOVERNOR 4FOR PNEUMATIC MOTORS Filed Feb. 1 4.l -1921 @a n alla Y cially adapted for use Patented vJuly 3, 1923.

' WILLIAM c. COLLIGNON, 'onogICAGQjILLINQIsp-I( 'SPEED GOVERNOR RoR RNRUMATIC Mo'ToRs.

"""pplication filed February 14.1921- Serial Nvu-444,686.

One `of the objects of ,the invention is toy providelan .improvedspeed governor for pneumatlc motors. j

Another object is to provide an improved f speed governor for. pneumatic lmotors espein connection with Piano.Plafyerav v' f.. Y

Another object is to simplify the structure and to render it more elIective and durable.

Other, further and more specific objects of the invention will become readily apparent, to persons skilled in the art, from a consideration of the following description, when taken in conjunction with the drawings, wherein Fig. 1 is a section taken on line 1-1 of Fig. 2.

Fig. 2 is a section taken on line 2-2 of Fi l.

ig. 3 is a section taken on line 3-3 of Fig. 2. j

Fig. l is a section taken on line 4-4 of Fi 3.

n all the views the same reference characters are employed to indicate similar parts.

lautomatic means, whereby manual adjustment may be made to operate the motor at full speed without changing the adjustment of vthe automatic means.

In the particular embodiment illustrated end l0 of the valve 9 fis-providedwwitha ltapering slot llsothat the passageway *8, may. be gradually; openedl Vthereby by, use yof the,` sliding. manuallyyjoperated rod\12,; Rising. from the body, portion; :of the .valve -9 l,is a.

stem 13having a slotll with .which the .angularlydisposed end 15),-, of the, :rod .12,v engagesf-TO open the .passageway 8, byA means of the valve 9,theirod 12is movedin theV direction o the arrow 16andrto lclosethe o is a `casing'containing avalve'chamber'f and opening therefrom; are -v two. l passage- Ways, ork air conduits, 7 an'da8.y A .valve 9 L is slidable to close the opening'.` lIThe rear' passageway itis movedin the oppositehdi-k' rectOn.

valve `17 and is provided withanupturned end 2l whichv engages the stem 20 to raise the valve by operation of the rod 19.

Below the casing 5 is a plate 22 whichhas openings 23 and 24 to correspond with the openings 7 and 8 in the casing 5. Belowl the plate 22 is a bellows structure or pneumatic action 25, enclosing a chamber 26 which is in controlled communication with the chamber 6 by means of the passageways 7 and 8.

A pressure responsive member 27 operated by movement of the diaphragm 27 is hinged as at 28 to a support 29 through an 'openin v30 in which a valve lever 31 is vertica ly movable. The rear end of the valve lever 31 is connected to the pressure responsive member 27, at 32. The chamber 26, of the pneumatic action, is connected to the passageway 7 through va port 33 which is adapted t0 be closed by the valve 34.

In Fig. 2 all of the valves are shown closed and the bellows is shown to be somewhat collapsed. In normal positions, when the chambers 6 and 26 are at atmospheric pressure, the diaphragm is more or less taut, being extended b member 27 occupies -a lower position than that shown inthe drawings with the valve 34 off its seat in the chamber 7, which communicates with the passageway 7 The weight 35 is attached to the pressure responsive member 27 by a screw threaded the weight .35 fand the f v rod 36 which is rotatable by the flattened end or handle 37. The rod is supported in eyebolts 38 and 39, fore and aft, and when the screw 36 is turned by the handle 37 the weight is thereby moved outwardly of the hinge r inwardlyi towards ytheI hinge to ny crease `-fthe f eiect of the weight @upon `lthe bellows structure. Y

It will be manifestthat with .agiven,suc tion efect the structure" Awil`l ymaintain the valve 34 closed to Aalgreate1*extentWilken the weight 35 is nearer the hinge 28, and to a lesser extent when it 'isfmoved outwardly" on the rod 36.

The lvalve-:34: is ,mounted upon fa sternlO ,around ywhiohislan open spring l4l ,byl means of which the valvei's yieldingly selfadjust-y ingupon theport.

opening-i3 is an outletto the casingy 5 :and

' persons' skilledinftheart th-at considerable change "may be made in ther general* ar'- rangement and configuration of the parts within" the' scope 'of` the appended claim.

kHaving described my ,invention what I claim :as new. and. desire tov Esecure by lLetters Patent, is

device of' the character described com- 'prising a casing 'providing an elongated, horizontal arlvchamber of which a bellows chamber forms an aligning part, and two parallel vertical ainpassageways normally connecting said elongated horizontal air chambers; manual valvescontrolling said verticalV passageways; in .combination with s abellows enclosing` chamber constituting s one part of one of said,horizontalair` chambers `.a -lever extending .into the other align-v ingpart of said air chamber and-'secured to themotvepart of saidzbellows; apo'ppet` valve operable thereby for-controlling one oflsaid svertcal air -passageways Lwhereby said lever lifts said valve whenilthe-bellows is extended and `closes the 1 ,valve ,whenriti is collapsed 'and a yweight adjustable. longitudinally 0f the movable partffot the bellows structure.- -ff VyIn'- testimon'yvvwhereof =I hereunto sub;- scrbedlmy name.

WILLIAM o. ooItLIeNoN. 

